Вычислите 1/4+3/5 9/11-2/5 13/16-9/32 3/28+5/14 14/15+7/10 3/8+1/6 9/25-7/20 37/42-17/24 11/24-3/16 9/16+7/24-3/8 1/3-1/6+1/4 2/5+14/15-5/9
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